Foreign/C/Types.hs

   1 {-# OPTIONS -fno-implicit-prelude #-}
   2 -----------------------------------------------------------------------------
   3 -- |
   4 -- Module      :  Foreign.C.Types
   5 -- Copyright   :  (c) The FFI task force 2001
   6 -- License     :  BSD-style (see the file libraries/base/LICENSE)
   7 --
   8 -- Maintainer  :  ffi@haskell.org
   9 -- Stability   :  provisional
  10 -- Portability :  portable
  11 --
  12 -- Mapping of C types to corresponding Haskell types. A cool hack...
  13 --
  14 -----------------------------------------------------------------------------
  15
  16 module Foreign.C.Types
  17         ( -- Integral types, instances of: Eq, Ord, Num, Read, Show, Enum,
  18           -- Typeable, Storable, Bounded, Real, Integral, Bits
  19           CChar(..),  CSChar(..),  CUChar(..)
  20         , CShort(..), CUShort(..), CInt(..),   CUInt(..)
  21         , CLong(..),  CULong(..)
  22 #ifndef __HUGS__
  23         , CLLong(..), CULLong(..)
  24 #endif
  25
  26           -- Floating types, instances of: Eq, Ord, Num, Read, Show, Enum,
  27           -- Typeable, Storable, Real, Fractional, Floating, RealFrac,
  28           -- RealFloat
  29         , CFloat(..),  CDouble(..), CLDouble(..)
  30         ) where
  31
  32 import Data.Bits        ( Bits(..) )
  33 import Data.Int         ( Int8,  Int16,  Int32,  Int64  )
  34 import Data.Word        ( Word8, Word16, Word32, Word64 )
  35 import Data.Dynamic
  36
  37 #ifdef __GLASGOW_HASKELL__
  38 import GHC.Base
  39 import GHC.Float
  40 import GHC.Enum
  41 import GHC.Real
  42 import GHC.Show
  43 import GHC.Read
  44 import GHC.Num
  45 #endif
  46
  47 #include "Dynamic.h"
  48 #include "CTypes.h"
  49
  50 INTEGRAL_TYPE(CChar,tyConCChar,"CChar",HTYPE_CHAR)
  51 INTEGRAL_TYPE(CSChar,tyConCSChar,"CSChar",HTYPE_SIGNED_CHAR)
  52 INTEGRAL_TYPE(CUChar,tyConCUChar,"CUChar",HTYPE_UNSIGNED_CHAR)
  53
  54 INTEGRAL_TYPE(CShort,tyConCShort,"CShort",HTYPE_SHORT)
  55 INTEGRAL_TYPE(CUShort,tyConCUShort,"CUShort",HTYPE_UNSIGNED_SHORT)
  56
  57 INTEGRAL_TYPE(CInt,tyConCInt,"CInt",HTYPE_INT)
  58 INTEGRAL_TYPE(CUInt,tyConCUInt,"CUInt",HTYPE_UNSIGNED_INT)
  59
  60 INTEGRAL_TYPE(CLong,tyConCLong,"CLong",HTYPE_LONG)
  61 INTEGRAL_TYPE(CULong,tyConCULong,"CULong",HTYPE_UNSIGNED_LONG)
  62
  63 #ifndef __HUGS__
  64 INTEGRAL_TYPE(CLLong,tyConCLLong,"CLLong",HTYPE_LONG_LONG)
  65 INTEGRAL_TYPE(CULLong,tyConCULLong,"CULLong",HTYPE_UNSIGNED_LONG_LONG)
  66 #endif
  67
  68 {-# RULES
  69 "fromIntegral/a->CChar"   fromIntegral = \x -> CChar   (fromIntegral x)
  70 "fromIntegral/a->CSChar"  fromIntegral = \x -> CSChar  (fromIntegral x)
  71 "fromIntegral/a->CUChar"  fromIntegral = \x -> CUChar  (fromIntegral x)
  72 "fromIntegral/a->CShort"  fromIntegral = \x -> CShort  (fromIntegral x)
  73 "fromIntegral/a->CUShort" fromIntegral = \x -> CUShort (fromIntegral x)
  74 "fromIntegral/a->CInt"    fromIntegral = \x -> CInt    (fromIntegral x)
  75 "fromIntegral/a->CUInt"   fromIntegral = \x -> CUInt   (fromIntegral x)
  76 "fromIntegral/a->CLong"   fromIntegral = \x -> CLong   (fromIntegral x)
  77 "fromIntegral/a->CULong"  fromIntegral = \x -> CULong  (fromIntegral x)
  78 "fromIntegral/a->CLLong"  fromIntegral = \x -> CLLong  (fromIntegral x)
  79 "fromIntegral/a->CULLong" fromIntegral = \x -> CULLong (fromIntegral x)
  80
  81 "fromIntegral/CChar->a"   fromIntegral = \(CChar   x) -> fromIntegral x
  82 "fromIntegral/CSChar->a"  fromIntegral = \(CSChar  x) -> fromIntegral x
  83 "fromIntegral/CUChar->a"  fromIntegral = \(CUChar  x) -> fromIntegral x
  84 "fromIntegral/CShort->a"  fromIntegral = \(CShort  x) -> fromIntegral x
  85 "fromIntegral/CUShort->a" fromIntegral = \(CUShort x) -> fromIntegral x
  86 "fromIntegral/CInt->a"    fromIntegral = \(CInt    x) -> fromIntegral x
  87 "fromIntegral/CUInt->a"   fromIntegral = \(CUInt   x) -> fromIntegral x
  88 "fromIntegral/CLong->a"   fromIntegral = \(CLong   x) -> fromIntegral x
  89 "fromIntegral/CULong->a"  fromIntegral = \(CULong  x) -> fromIntegral x
  90 "fromIntegral/CLLong->a"  fromIntegral = \(CLLong  x) -> fromIntegral x
  91 "fromIntegral/CULLong->a" fromIntegral = \(CULLong x) -> fromIntegral x
  92  #-}
  93
  94 FLOATING_TYPE(CFloat,tyConCFloat,"CFloat",HTYPE_FLOAT)
  95 FLOATING_TYPE(CDouble,tyConCDouble,"CDouble",HTYPE_DOUBLE)
  96 -- HACK: Currently no long double in the FFI, so we simply re-use double
  97 FLOATING_TYPE(CLDouble,tyConCLDouble,"CLDouble",HTYPE_DOUBLE)
  98